1
MCQ (Single Correct Answer)

JEE Main 2016 (Online) 9th April Morning Slot

The correct order of the solubility of alkaline-earth metal sulphates in water is :
A
Mg < Ca < Sr < Ba
B
Mg < Sr < Ca < Ba
C
Mg > Sr > Ca > Ba
D
Mg > Ca > Sr > Ba
2
MCQ (Single Correct Answer)

JEE Main 2016 (Online) 10th April Morning Slot

The commercial name for calcium oxide is :
A
Milk of lime
B
Slaked lime
C
Limestone
D
Quick lime
3
MCQ (Single Correct Answer)

JEE Main 2017 (Offline)

Both lithium and magnesium display several similar properties due to the diagonal relationship; however, the one which is incorrect, is:
A
both form soluble bicarbonates
B
both from nitrides
C
nitrates of both Li and Mg yield NO2 and O2 on heating
D
both form basic carbonates

Explanation

Mg can form basic carbonate like

3MgCO3 . Mg(OH)2 . 3H2O

While Li can not.
4
MCQ (Single Correct Answer)

JEE Main 2017 (Online) 9th April Morning Slot

Which one of the following is an oxide ?
A
KO2
B
BaO2
C
SiO2
D
CsO2

Explanation

Na, H, Ba and Sr produce Peroxide.

K, Rb and Cs produces Superoxide.

So, Sio2 will be oxide.

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